505125512123 has 4 divisors (see below), whose sum is σ = 534838777560. Its totient is φ = 475412246688.

The previous prime is 505125512113. The next prime is 505125512197. The reversal of 505125512123 is 321215521505.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 505125512123 - 2⁸ = 505125511867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505125512123.

It is not an unprimeable number, because it can be changed into a prime (505125512113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14856632693 + ... + 14856632726.

It is an arithmetic number, because the mean of its divisors is an integer number (133709694390).

Almost surely, 2^505125512123 is an apocalyptic number.

505125512123 is a deficient number, since it is larger than the sum of its proper divisors (29713265437).

505125512123 is a wasteful number, since it uses less digits than its factorization.

505125512123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29713265436.

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 505125512123 in words is "five hundred five billion, one hundred twenty-five million, five hundred twelve thousand, one hundred twenty-three".